Question 11.24: Determine the overall heat-transfer coefficient for the comp...

Determine the overall heat-transfer coefficient for the composite wall of Illustrative Problem 11.4 if h on the hot side is 0.9 Btu/(h·ft .^{2}·°F) and h on the cold side is 1.5 Btu/(h·ft .^{2}·°F). The temperatures given are to be the respective air temperatures (see Figure 11.7).

 

11,7
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